Sorry to rehash an old question, but I have a 6-speed with 3:21's and want to go to 35" tires. I have a 2.5 coil and shock lift. What happens if I don't regear and run with my stock gears?

 

I currently have 3.21's and 35's.....no problem at all as I have pretty flat land here. My guess is you are gonna hate life with the terrain you have. I have no 6th and it sucks going up what little hills we do have. I can't imagine going through the mountains this way...and I won't. Gears are on my very short list.

 

as mentioned, you will be fine but your performance will get sluggish. just try to pick up a hypertech programmer or aev procal and calibrate your speedometer.